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Surprising! I know the M takes great pictures, but mine is not as good as my 6D.

The last two 6D shots show that you might benefit from running AFMA on your 6D and lens, the live view manual focus is slightly sharper than the AF, but AF is not always dead-on. You would need to take more pictures to check both precision and accuracy of AF.

A: Confirm that you took everything on tripod with remote trigger, and/or using fast enough SS that it doesn't matter?

B: Tell the settings for all shots (SS, Aperture, ISO, focus mode)

C: Take shots at same equivalent distance/focal length/aperture, e.g. if you shoot M@22 (x1.5), then shoot both at the 33mm, and e.g. F8.0.

It does sound there might be something wrong with your 6D, but taking some more extra tests might be able to resolve what's going on in there.

Thanks for the suggestions.

A. I did all these with a monopod, didn't have a tripod available. All at 1/250 or faster, so should be OK with a monopod. That said, I think I'll do more testing tomorrow on a tripod with a wireless trigger.

B. I kept this as much the same as I could. I don't have the values now as I won't be at home until tomorrow. But approximately 1600 ISO for the clock shots and ISO200 for the fire hydrant. 1/250 at f4.

C. I used the 135 f2 lens for all these comparisons, so FOV is different, but I wanted to keep the glass the same to take that out of the equation. I did similar test with my 24-105 f4 with similar results.

This is kind of upsetting as I paid nearly $2k for the 6D and have higher expectations for IQ than I do for my $299 M.

There is no point comparing two different format with different pixel density if you use the same lens and at same shooting distance: The denser sensor will give you more detail in the same real world area.

Now try to frame the same shot, by choosing a longer focal length on 6D and compare the results. M @ 24mm f4, vs 6D @ 38mm f6.3, Now who's sharper?

I have a funny feeling the high ISO NR settings were set differently on both cameras..The M should have the same IQ as a 650D since it's the same sensor..The 6D being a FF camera should be better than the M..

I have a funny feeling the high ISO NR settings were set differently on both cameras..The M should have the same IQ as a 650D since it's the same sensor..The 6D being a FF camera should be better than the M..

I was thinking the same thing. I shot the 2nd and 3rd set of pictures in RAW so the JPG settings (like high ISO NR, sharpening, white balance, etc.) difference between the two cameras would not affect the outcome. RAW converted to highest resolution JPG in Canon Digital Photo Professional in batch mode (all settings the same).

I have a funny feeling the high ISO NR settings were set differently on both cameras..The M should have the same IQ as a 650D since it's the same sensor..The 6D being a FF camera should be better than the M..

I was thinking the same thing. I shot the 2nd and 3rd set of pictures in RAW so the JPG settings (like high ISO NR, sharpening, white balance, etc.) difference between the two cameras would not affect the outcome. RAW converted to highest resolution JPG in Canon Digital Photo Professional in batch mode (all settings the same).

If the in-camera settings were different, you've still got an issue (as the WB shows). DPP respects and applies the in-camera JPG settings, so unless you went in and actually changed all settings to be identical in DPP (which you didn't, at least not WB), you still don't have a good test. But at least all you need to do is go back and reprocess the RAWs.

If the in-camera settings were different, you've still got an issue (as the WB shows). DPP respects and applies the in-camera JPG settings, so unless you went in and actually changed all settings to be identical in DPP (which you didn't, at least not WB), you still don't have a good test. But at least all you need to do is go back and reprocess the RAWs.

Sorry, I got in a hurry and messed this up. The WB on the M was set to Tungsten in my last post.Here is another try. WB set to daylight for both. Sharpness settings in the middle for both. EF 70-200 2.8 II lens used for both shots, RAW processed in DPP as a batch with all default settings. 100% crops of JPG.